зеркало из https://github.com/mozilla/pjs.git
152 строки
5.0 KiB
C++
152 строки
5.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "InsertElementTxn.h"
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#include "nsISelection.h"
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#include "nsIContent.h"
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#include "nsIDOMNodeList.h"
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#include "nsReadableUtils.h"
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#ifdef NS_DEBUG
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static PRBool gNoisy = PR_FALSE;
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#endif
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InsertElementTxn::InsertElementTxn()
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: EditTxn()
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{
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}
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NS_IMETHODIMP InsertElementTxn::Init(nsIDOMNode *aNode,
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nsIDOMNode *aParent,
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PRInt32 aOffset,
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nsIEditor *aEditor)
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{
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NS_ASSERTION(aNode && aParent && aEditor, "bad arg");
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if (!aNode || !aParent || !aEditor)
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return NS_ERROR_NULL_POINTER;
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mNode = do_QueryInterface(aNode);
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mParent = do_QueryInterface(aParent);
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mOffset = aOffset;
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mEditor = aEditor;
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if (!mNode || !mParent || !mEditor)
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return NS_ERROR_INVALID_ARG;
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return NS_OK;
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}
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NS_IMETHODIMP InsertElementTxn::DoTransaction(void)
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{
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#ifdef NS_DEBUG
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if (gNoisy)
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{
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nsCOMPtr<nsIContent>nodeAsContent = do_QueryInterface(mNode);
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nsCOMPtr<nsIContent>parentAsContent = do_QueryInterface(mParent);
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nsString namestr;
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mNode->GetNodeName(namestr);
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char* nodename = ToNewCString(namestr);
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printf("%p Do Insert Element of %p <%s> into parent %p at offset %d\n",
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this, nodeAsContent.get(), nodename,
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parentAsContent.get(), mOffset);
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nsMemory::Free(nodename);
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}
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#endif
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if (!mNode || !mParent) return NS_ERROR_NOT_INITIALIZED;
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nsCOMPtr<nsIDOMNodeList> childNodes;
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nsresult result = mParent->GetChildNodes(getter_AddRefs(childNodes));
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if (NS_FAILED(result)) return result;
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nsCOMPtr<nsIDOMNode>refNode;
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if (childNodes)
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{
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PRUint32 count;
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childNodes->GetLength(&count);
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if (mOffset>(PRInt32)count) mOffset = count;
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// -1 is sentinel value meaning "append at end"
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if (mOffset == -1) mOffset = count;
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result = childNodes->Item(mOffset, getter_AddRefs(refNode));
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if (NS_FAILED(result)) return result;
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// note, it's ok for mRefNode to be null. that means append
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}
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mEditor->MarkNodeDirty(mNode);
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nsCOMPtr<nsIDOMNode> resultNode;
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result = mParent->InsertBefore(mNode, refNode, getter_AddRefs(resultNode));
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if (NS_FAILED(result)) return result;
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if (!resultNode) return NS_ERROR_NULL_POINTER;
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// only set selection to insertion point if editor gives permission
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PRBool bAdjustSelection;
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mEditor->ShouldTxnSetSelection(&bAdjustSelection);
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if (bAdjustSelection)
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{
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nsCOMPtr<nsISelection> selection;
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result = mEditor->GetSelection(getter_AddRefs(selection));
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if (NS_FAILED(result)) return result;
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if (!selection) return NS_ERROR_NULL_POINTER;
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// place the selection just after the inserted element
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selection->Collapse(mParent, mOffset+1);
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}
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else
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{
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// do nothing - dom range gravity will adjust selection
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}
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return result;
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}
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NS_IMETHODIMP InsertElementTxn::UndoTransaction(void)
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{
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#ifdef NS_DEBUG
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if (gNoisy) { printf("%p Undo Insert Element of %p into parent %p at offset %d\n",
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this, mNode.get(), mParent.get(), mOffset); }
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#endif
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if (!mNode || !mParent) return NS_ERROR_NOT_INITIALIZED;
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nsCOMPtr<nsIDOMNode> resultNode;
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return mParent->RemoveChild(mNode, getter_AddRefs(resultNode));
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}
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NS_IMETHODIMP InsertElementTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("InsertElementTxn");
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return NS_OK;
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}
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